Switch mechanism



Nov. 14, 1939. STRECK 2,180,022

SWITCH MECHANISM Filed 001,. 23, 1957 wrom/Ex UNITED STATE-s PATENT'oFFics z,1so.ozz

swrrcn Mscnsmsir Charles Streek, St. Louis, Mo., assignor to The Emerson Electric Mfg. Co., St. Louis, Mo., a corporation of Missouri Application October 23, 1937, Serial No. 170,583

4 Claims. (Cl. 20o-80) The present invention relates generally to body section I 3 by a web I6 which has a notch switches, and more particularly to an electric 20 cut therein. switch which is adapted to be used in conjunction The body section I3 has a boss 22 formed on with and to be actuated by a centrifugal mechthat side disposed towards the base Il and has a anism. relatively large aperture 23 therethrough located o An object of the present invention is to proabove the boss 22 for the purpose oi facilitating vide an electric switch which includes contacts the assembly of the switch elements. A ilange that are under constant contact pressure when 26 extends from that edge of the body section I3 lthe switch is closed. opposite to the edge to which the prongs I4 and Another object is to provide a switch in which I5 are connected. 10

'the contacts thereof are mounted for wiping ac- The flange 26 includes a slot 21 (Fig. 6) adtlon in make and break operations. jacent the free edge, the configuration of which Another object is to provide a switch which provides shoulders 26 and 29. The ange 26 is incorporates all of the characteristics of simcut away at 30 to provide an opening to the slot plicity as tofacility of manufacture, inexpensive- 21 and to provide projections 3| and 32. Tabs 15 ness, minimum number of parts, and ease of op- 33 and 34 initially extend from the free corners eration. of the flange 26 in a plane parallel to the plane Another object is t0 provide a switch of novel of the body section I3, an optional tab being beni; construction which is particularly adapted to be through substantially 180 as is shown for the tab used in conjunction with centrifugally Operated 33 to securely retain a lead 33. The lead 33 20 mechanism and Which. therefOIe, lends itself eS- may be operatively connected to a heater, or the pecially to the control of the starting circuit of 11kg (not shown), a motor in the normal operation thereof. The base II includes a tab 35 which is cut Other objects and advantages Will be apparent away adjacent its juncture with the base II to from the following description, taken in COnprovide oppositely disposed recesses 36 and 3l 25 Junction with the accompanying drawing, in forming a central neck 3s. which: The neck 36 is adapted to slide between the Fig. 1 is a side view of a switch constructed in projections 3l and 32 into a position whereby a accordance With the teachings 0f the Present inportion thereof rests within the narrowed secvention, shown mounted on a motor in operative tion of the slot 21 (Fig. 6). In the operative po- 30 disposition relative to a centrifugally operated sition of the neck 38 the shoulders 28 and 26 rest mechanism, certain of the motor elements being in the recesses 36 and 3l. In the assembly of in section; the switch mechanism I0, after the neck 38 has Flc. 2 is a section on the line 2-2 of Fis. 1. been disposed as aforesaid, the projections 3| showing the Switch ln full front View; and 32 are bent vdownwardly into the position 35 Fig. 3 is a section on the line 3-3 of Fig. 2; shown in Fig. 5. F18. 4 is a section on the line 4-4 of F152; The base Il supports in fixed relation a re- F18. 5 i8 8 reel' View ofthe Switch; and, taining member 4I) which includes a main section Fig. 61s a top view of the switch. 4I and an extension 42 which is bent twice at 90 Referring to the drawing more particularly b to provide a hook 43 (Figs. 4 and 5). One seg- 40 reference numerals, l0 indicates generally 9 ment 44 of the extension 42 is disposed in a switch constructed in accordance with the teachnotch 45 in the base I I to prevent the retaining ings of the present invention. A base Il of inmember from pivoting about its connection sulating material pivotally supports a forked 46 with the base Il. The hook 43 provides one member generally designated I2. limit for the pivotal movement of the forked 45 The forked member I2 includes a nat body member I2, contacting the web I9. The segment section I3 from Whieh extend tWO DIOnss I4 and 44 of the retaining member 40 extends through l5 in Plane Parallel tnel'ete but offset towards the notch 20 to prevent lateral movement of the plane of the body (Fig. 4). To the free end the forked member l2 (Figs, 4 and 5) 50 o! each of the prongs I3 and I5 is connected a In the assembly of the switch elements, this 50 disc I6 of felt, or the like, by a rivet Il. Each retaining member 40 is connected to the base II of the prongs I4 and I5 further supports a conwith the segment 44 disposed in the slot 45 and tact I3 adjacent the connecting extremity and with the prong 43 against the web I9 after the on the side disposed towards the base Il. The forked member I2 has been disposed in the prongs I4 and I5 are connected adjacent the above-described relation to the tab 35. 55

-annular groove 1U and a shoulder 1I.

At each side of the retaining member 40 a contact-carrying arm 48 is connected tothe base I I by rivets 41 (Fig. 5). A contact 49 is supported by an offset portion 59 of each contact-carrying arm 48, the offset portion 50 being connected to the contact-carrying arm 48 proper by a right angularly disposed portion 5| which extends through a notch 52 in the base I I (Figs. 4 and 5). The arms 48 are of resilient material so that the contacts 49, which are disposed in cooperative relation to the contacts I8, can yield when the contacts I8 are moved against them to provide a wiping make and break action.

A helical spring 55 is disposed between the forked member I2 and the retaining member 46., one end thereof being disposed about the boss 22 and the other end being against the retaining member 40, the spring 55 extending through an aperture 56 in the base II to effect this relationship (Fig. 4).

A lead clamp 51 is secured by each rivet 41 against the associated arm 48. Leads 58 and 59 are securely held by the clamps 51.

In Fig. 1, the switch I0 is shown mounted on a motor 62 in operative relation to a centrifugally actuated mechanism 66. The switch IIJ is shown as spaced from and fastened to a securing plate 6I) which is, in turn, spaced from and secured to an end plate 6I of the motor 62. The motor 62 includes a rotor 63 and a stator 64, the rotor 63 being secured to and rotated, with a shaft 65. The centrifugally operated mechanism 66 includes a plate member 61 having parallel extensions 68 disposed to each side of the shaft 65, the configuration of which are shown in dotted lines. A sleeve 69 is freely mounted on the shaft between the extensions 68, and includes an A helical spring 12 is disposed about the sleeve 69 between the shoulder 1I and the member 61 which biases the sleeve 69 away from the member 61. Weights 13 are pivoted by pins 14 to the extensions 68, each of which includes extensions 15 which support pins 11 disposed in the annular groove 1I.

Operation moving the pins 11 and therethrough the sleevev 69 to the right (Fig. 1).l Since the contacts I8 and 49 are maintained in the make relation by the abutment of the sleeve 69 against the pads y I6 of the prongs I4 and I5 of the forked member I2, movement of the sleeve 69 to the right permits the helical spring 55 to exert its force to move the forked member I2 into the position shown in Fig. 4, thereby breaking the contacts I6 and 49 which breaks the starting circuit. 'I'he breakinglandmaking actions of the contacts I8 and 49 are wiping actions, since the contacts I8 and 49 are wiped across each other rather than pulled apart perpendicularly, due to theipivotal mountings of both of these sets of contacts.

It is thus apparent that there has been 'provided a switch particularly adapted to be used in conjunction with centrifugally operated mechanism which is simple in construction and operation, which is inexpensive, and which includes a minimum number of parts. The several elements of the switch are easy to manufacture and to assemble into the finished product.

It is to be understood that the foregoing description and accompanying drawing have been given by Way of illustration and example and not for purposes of limitation, the invention being limited only by the claims which follow.

What is claimed is:

1. A switch comprising a non-conductive base, said base including a tab extending from one edge thereof, a forked member pivotally connected to said tab and to the adjacent edge of the base including prongs adapted to be contacted by a centrifugally actuated mechanism, contacts carried by saidA member, and other contacts supported by said base in cooperative disposition relative to the rst-named contacts.

2. A switch comprising a base, a member pivoted thereto, contacts supported by said member spaced from one face of the base, contact-carrying arms connected to the opposite face of said base andextending through slots in said base, and contacts on said arms disposed in cooperative relation to said first contacts.

3. A compact switch comprising a'base, a forked member pivoted directly to an edge of said base through cooperative engagement of integral parts of the base and the member, spaced contacts supported thereby, two arms supported by said base, each having a free end, a contact on each free end, said several contacts being in cooperative disposition. a retaining member for establishing one extreme positionv of the member, and a spring biasing said member into said one extreme position.

4. A switch comprising a base including a tab having portions spaced from said base by rec and a neck established by said recesses, a member pivotally connected to said base by a ange having a slot in which said tab neck rests, said slot dening shoulders disposed in'said recesses and adjacent said tab neck, said flange including projections disposed at an angle to maintain said tab neck within the slot, contacts carried by said member, and other cooperative contacts carried by said base.

- CHARLES STRECK. 

